Ultralow-temperature test device suitable for LNG immersed pump

Abstract

The invention discloses an ultralow-temperature test device suitable for an LNG immersed pump. The ultralow-temperature test device comprises a test storage tank, a circulation storage tank, a suction pipe and a discharge pipe. An inlet of the discharge pipe is inserted in an outlet of the test storage tank in a sealed mode. An inlet of the test storage tank is connected with an outlet of the suction pipe. An inlet of the suction pipe is connected with an outlet of the circulation storage tank. An inlet of the circulation storage tank is connected with an outlet of the discharge pipe. The test storage tank is internally provided with a vibration sensor and an axial displacement sensor. A pump suction port thermometer, a pump suction port pressure meter and an electrical connection sealing piece are arranged on the test storage tank. The discharge pipe is provided with a pump outlet thermometer, a pump outlet pressure meter and a pump outlet flowmeter. A cooling mechanism for cooling test media is arranged in the circulation storage tank. According to the ultralow-temperature test device suitable for the LNG immersed pump, the working condition of the LNG immersed pump during practical application is simulated to conduct performance testing, the performance presentation of the LNG immersed pump in the practical operation process can be evaluated maximally, and the working performance, the safety performance and the stability of the LNG immersed pump are verified.

Description

technical field [0001] The invention relates to the field of low-temperature testing of submersible pumps, in particular to an ultra-low temperature testing device suitable for LNG submersible pumps. Background technique [0002] The LNG submersible pump is a pump equipment used to transport ultra-low temperature liquefied natural gas. When working, its entire pump body is immersed in liquid LNG. The built-in motor drives the centrifugal impeller to rotate at high speed to transport LNG out of the storage tank. This type of pump is widely used in facilities such as LNG storage tanks on land and LNG ships at sea. [0003] Due to the ultra-low temperature of the LNG medium and its volatile, flammable and explosive characteristics, the LNG submersible pump needs to be immersed in a closed LNG storage tank when it is working. The cable is connected to the motor inside the LNG submersible pump from the outside through a special sealing structure. The operation of the LNG submers...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing technology cannot fully simulate the actual working conditions for the whole machine test, the embodiment of the present invention provides an ultra-low temperature test device suitable for LNG submersible pumps

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